#include <iostream>
using namespace std;
 int main(){
    char ch;
    cin>>ch;
    if((>='A'&& ch <='Z')||(ch>='a&&ch<=z')){
        cout<<"Alphabet";
    }
    else if(ch>='0'&& ch<='9'){
        cout<<"Digit";
    }
    else{
        cout<<"Special character";
    }
    return 0;
 }